[Bug 41756] Kernel NULL pointer dereference

[EJ Finneran]

Public bug reported:

Affects: linux-meta linux-image-2.6-k7 (Ubuntu)
       Severity: Normal
       Priority: (none set)
         Status: Unconfirmed


Description:
I'm not sure what started it but once this started happening, no program
would run until I performed a reboot.

Apr 27 09:54:17 kal-el kernel: [4297794.512000] c016ee00
Apr 27 09:54:17 kal-el kernel: [4297794.512000] PREEMPT SMP 
Apr 27 09:54:17 kal-el kernel: [4297794.512000] Modules linked in: vmnet vmmon binfmt_misc rfcomm l2cap bluetooth cpufreq_powersave cpufreq_stats cpufreq_userspace cpufreq_ondemand cpufreq_conservative freq_table tc1100_wmi video acpi_sbs battery i2c_acpi_ec container button pcc_acpi sony_acpi ac dev_acpi hotkey nls_iso8859_1 nls_cp437 vfat fat nls_utf8 ntfs ipv6 sg sd_mod dm_mod md_mod asb100 hwmon_vid af_packet eeprom ds1621 sr_mod sbp2 lp snd_emu10k1_synth snd_emux_synth snd_seq_virmidi snd_seq_midi_emul snd_seq_dummy snd_seq_oss snd_seq_midi snd_seq_midi_event floppy tsdev snd_seq snd_emu10k1 snd_rawmidi snd_ac97_codec snd_ac97_bus usb_storage snd_pcm_oss snd_mixer_oss scsi_mod parport_pc parport usblp pcspkr nvidia snd_pcm snd_seq_device snd_timer snd_page_alloc snd_util_mem snd_hwdep snd i2c_viapro i2c_core soundcore psmouse shpchp pci_hotplug via_ircc 3c59x mii rtc serio_raw irda crc_ccitt via_agp emu10k1_gp ohci1394 ieee1394 gameport agpgart evdev reiserfs ide_generic ehci_hcd uhci_hcd usbcore ide_cd cd
Apr 27 09:54:17 kal-el kernel: om ide_disk generic via82cxxx thermal processor fan fbcon tileblit font bitblit softcursor capability commoncap
Apr 27 09:54:17 kal-el kernel: [4297794.512000] CPU:    0
Apr 27 09:54:17 kal-el kernel: [4297794.512000] EIP:    0060:[put_unused_fd+16/96]    Tainted: P      VLI
Apr 27 09:54:17 kal-el kernel: [4297794.512000] EFLAGS: 00210296   (2.6.15-21-k7) 
Apr 27 09:54:17 kal-el kernel: [4297794.512000] EIP is at put_unused_fd+0x10/0x60
Apr 27 09:54:17 kal-el kernel: [4297794.512000] eax: 00000015   ebx: 08599038   ecx: c16c9e20   edx: c16c9e30
Apr 27 09:54:17 kal-el kernel: [4297794.512000] esi: 00000015   edi: e8fec000   ebp: 00000015   esp: da059f84
Apr 27 09:54:17 kal-el kernel: [4297794.512000] ds: 007b   es: 007b   ss: 0068
Apr 27 09:54:17 kal-el kernel: [4297794.512000] Process kopete (pid: 5769, threadinfo=da058000 task=da027560)
Apr 27 09:54:17 kal-el kernel: [4297794.512000] Stack: 08599038 00018800 e8fec000 c016efb9 e8fec000 00018800 b6ee597c b7fd67a8 
Apr 27 09:54:17 kal-el kernel: [4297794.512000]        fffffffe 08599038 00018800 bffebc14 da058000 c0103417 08599038 00018800 
Apr 27 09:54:17 kal-el kernel: [4297794.512000]        b6ee597c 00018800 bffebc14 bffeb8c8 00000005 0000007b 0000007b 00000005 
Apr 27 09:54:17 kal-el kernel: [4297794.512000] Call Trace:
Apr 27 09:54:17 kal-el kernel: [4297794.512000]  [do_sys_open+249/256] do_sys_open+0xf9/0x100
Apr 27 09:54:17 kal-el kernel: [4297794.512000]  [sysenter_past_esp+84/117] sysenter_past_esp+0x54/0x75
Apr 27 09:54:17 kal-el kernel: [4297794.512000] Code: 44 24 0c be e8 ff ff ff e8 ce 98 19 00 83 c4 14 89 f0 5b 5e 5f 5d c3 8d 74 26 00 83 ec 0c 89 74 24 04 89 7c 24 08 89 c6 89 1c 24 <00> 00 e0 ff ff 21 e0 8b 00 8b 98 64 04 00 00 8d 00 b0 01 00 00 
Apr 27 09:54:19 kal-el kernel: [4297794.512000]  <1>Unable to handle kernel NULL pointer dereference at virtual address 00000004

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Kernel NULL pointer dereference
https://launchpad.net/bugs/41756